• The core devices that perform operations and produce results for complex calculations are housed in the system unit of a computer. The motherboard, CPU, RAM, and other components, as well as the chassis in which these devices are housed, are all included. This device does the majority of the tasks that a computer must complete.
• The term 'system unit' refers to the distinction made between the computer and its peripheral devices, such as the keyboard, mouse, and monitor. In layman's terms, a system unit is also known as a chassis or a tower.

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